About: Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The carbonized silica (SiO2:C) nanopowders were prepared by chemical modification of fumed silica (aerosil) by phenyltrimethoxysilane followed by thermal annealing at temperature in range of 500-800 °C in nitrogen flow. Their magnetic properties were investigated by electron paramagnetic resonance (EPR) in the temperature range from 4.2 K to 292 K. The initial and annealed SiO2:C samples revealed carbon (C) related defects. The carbon related radicals (CRR) in annealed SiO2:C nanopowders with g-factors 2.0042, 2.0039 were attributed to the oxygen (O)- centered CRR and C-centered CRR with a nearby O heteroatom, respectively. The EPR data were compared with infrared (IR) and photoluminescence (PL) data. It was found that the position of the PL band depends on the type of CRR formed after sample annealing. The PL with maximum intensity at 440 nm was found for the sample annealed at 500°C in which O-centered CRR was observed while in the sample anneal.... The carbonized silica (SiO2:C) nanopowders were prepared by chemical modification of fumed silica (aerosil) by phenyltrimethoxysilane followed by thermal annealing at temperature in range of 500-800 °C in nitrogen flow. Their magnetic properties were investigated by electron paramagnetic resonance (EPR) in the temperature range from 4.2 K to 292 K. The initial and annealed SiO2:C samples revealed carbon (C) related defects. The carbon related radicals (CRR) in annealed SiO2:C nanopowders with g-factors 2.0042, 2.0039 were attributed to the oxygen (O)- centered CRR and C-centered CRR with a nearby O heteroatom, respectively. The EPR data were compared with infrared (IR) and photoluminescence (PL) data. It was found that the position of the PL band depends on the type of CRR formed after sample annealing. The PL with maximum intensity at 440 nm was found for the sample annealed at 500°C in which O-centered CRR was observed while in the sample anneal.... (en)
Title	Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds (en)
skos:prefLabel	Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds (en)
skos:notation	RIV/68378271:_____/14:00427211!RIV15-AV0-68378271
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(LM2011029)
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Savchenko, Dariia
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	26903
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/14:00427211
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	carbonized silica nanopowders; annealing; EPR; carbon radicals; PL; IR absorption (en)
http://linked.open.../riv/klicoveSlovo	IR absorption PL carbon radicals carbonized silica nanopowders EPR annealing
http://linked.open...ontrolniKodProRIV	[5DCE7AF0FDFC]
http://linked.open...v/mistoKonaniAkce	Kyiv
http://linked.open...i/riv/mistoVydani	Zurich
http://linked.open...i/riv/nazevZdroje	Functional Nanomaterials and Devices VII
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	10 (xsd:int)
http://linked.open...vavai/riv/projekt	SAFMAT - Centre of Functional Materials Analyses
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Savchenko, Dariia Lysenko, V. S. Gontar, O. Kalabukhova, E. Nazarov, A. N. Rudko, G. Sitnikov, A. Starik, S. Tertykh, V. Vasin, A. V.
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open...ain/vavai/riv/wos	000336634400013
http://linked.open.../riv/zahajeniAkce	2013-04-08 (xsd:date)
issn	1022-6680
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.4028/www.scientific.net/AMR.854.99
http://purl.org/ne...btex#hasPublisher	Trans Tech Publications
https://schema.org/isbn	9783037859421

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